Impacts of anion-exchange-membranes with various ionic exchange capacities on the performance of H2/O2 fuel cells

► Impacts of varying IECs in AEMs on the performance of H2/O2 fuel cells were studied. ► The power density of fuel cells using the AEM (0.90 mmol g−1) reached 285 mW cm−2 at 50 °C. ► EIS revealed that the OH− transport resistance was a key factor limiting AEMFC performance. ► The OH− transport resistance depended on the nature of the AEM and the cell voltages.